FRANKPLEDGE n. 2 definitions
r the good behavior of freemen, -- each freeman who was a member of an ancient decennary, tithing, or friborg, in England, being a pledge for the good conduct of the others, for the preservation of the public peace; a free surety.
HEADBOROUGH; HEADBORROW n.
The chief of a frankpledge, tithing, or decennary, consisting of ten families; -- called also borsholder, boroughhead, boroughholder, and sometimes tithingman. See Borsholder. [Eng.] Blackstone.